SIMATIC S5 8DI 24 V DC input module
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12 months for new products and 6 months for used products.
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Siemens 6ES5421-8MA11 is a 421 digital input module for the SIMATIC S5 family. It provides 8 non-floating 24 V DC inputs and was used in systems including S5-90U, S5-95U, S5-100U and distributed ET 100U/ET 200U stations.
This product has been discontinued by the manufacturer. Catalog information identifies 6ES5421-8MA12 as the successor. For maintenance of an existing machine, however, replacement compatibility should not be assumed from the similar name alone – compare the complete part number, wiring and station configuration.
Documentation and service information are available from Siemens Industry Online Support. You can also check the newer 6ES5421-8MA12 and another S5 input module, 6ES5420-7LA11, in our catalog.
If you are selecting a spare part for an existing S5 station, send us the full number from the installed module. This helps reduce the risk of ordering the wrong variant.
